export function saveToLocal(id,key,value){
  let seller=localStorage.__seller__;
  if(!seller){
    seller={};
    seller[id]={};
  }else{
    seller=JSON.parse(seller);
    if(!seller[id]){
      seller[id]={};
    }
  }
  seller[id][key]=value;
  localStorage.__seller__=JSON.stringify(seller);
}
export function loadFromLocal(id,key,def){
  let seller=localStorage.__seller__;
  if(!seller){
    return def
  }
  seller=JSON.parse(seller)[id];
  if(!seller){
    return def
  }
  let ret=seller[key];
  return ret||def;
}
